Filter



A. HARF FILTER Oct. 30, 1934.

Filed Oct. 12, 1932 412 THUR HHRF INVENTOR ATTORNEY Patented Oct. 30, 1934 UNITED STATES PATENT OFFICE 1 Claim.

This invention relates to water filtering apparatus and is an improvement on the invention shown in my co-pending application Sr. No. 571,665, filed October 28, 1931.

6 An object of the invention is the provision of water filtering apparatus simple in construction and efiicient in action.

The invention will be fully and comprehensively understood from a consideration of the following 10 detailed description when read in connection with the accompanying drawing which forms part of the application with the understanding, however, that the improvement is capable of extended application and is not confined to the exact showing of the drawing nor to the precise construction described and, therefore, such changes and modifications may be made therefrom as do not affect the spirit of the invention nor exceed the scope thereof as expressed in the appended claim.

In the drawing:

Fig. 1 is a vertical longitudinal section of the tank and an elevational view of accessory parts.

Fig. 2 is an enlarged section taken on line 2-2 of Fig. 1.

Fig. 3 is a section taken on line 3-3 of Fig. 2; and

Fig. 4 is a fragmentary elevational view of the apertured partition employed in the tank.

Referring to the drawing for a more detailed description thereof, numeral 5 indicates a tank divided into compartments 6 and 7 by means of an apertured vertically disposed plate 8. The compartment 7 contains charcoal, which acts as a filtering and cleansing agent. Said tank has a filling opening at its top normally closed by a removable screw plug 9 so that the compartment 7 may be filled through the opening. A drainage pipe 10 includes a valve 11 which is normally closed but which may be opened when the water system is to be cleaned.

' An inlet pipe 12 which includes a valve 13 enters the tank adjacent the bottom of an end of the tank and an outlet pipe 14 is connected to the other end of the tank adjacent the top thereof. This arrangement of the inlet and outlet pipes makes for eflicient action of the filtering bed inasmuch as the water travels not only from one end of the tank to the other but also from the bottom to the top.

A by-pass pipe 15 which includes a valve 16, is connected to the inlet and outlet pipes, as shown. Said outlet pipe includes a valve 17 beyond the connection of the by-pass pipe to the outlet pipe.

The inlet pipe contains a screen 17a, held in position by a pair of peripherally threaded washers 18 which threadedly engage the interior of said inlet pipe and include each a diametrical bar 19 which facilitates screwing and unscrewing the washers. Fig. 3 shows a pair of said washers, one on each side of the screen and abutting thereagainst. A cylindrical screen 21 closed at its inner end is disposed in the compartment 6 and is connected to the outlet pipe. A plug 20 closes an aperture opening into compartment 6 from an end of the tank, this opening being provided for convenience in introducing a cleaning agent.

With the filter in action, the by-pass valve 16 is closed while the valves 13 and 1'? are open. When however it is desired to clean the filter, valves 13 and 17 are closed and valve 16 and 11 are open. When the house pipes are to be cleaned, valve 13 is closed and valves 16 and 17 are open and water containing soda ash is passed through the by-pass and outlet pipes and on through the system.

What is claimed as new is:

A filtering apparatus comprising a tank, an apertured screen plate in said tank adjacent one end thereof to provide a small compartment and a large compartment, filtering material in the large compartment, inlet means at the lower portion of the large compartment and opening directly to the filtering material, outlet means extending from the upper portion of the small compartment, a cylindrical screen disposed about the outlet means within the small compartment, valved by-pass means extending from the inlet means to the outlet means, a valve between the inlet means and the by-pass means, a valve for the outlet means, said by-pass means communicating with the outlet means between the latter and the last mentioned valve, and a valved drainage pipe extending from the bottom of the tank.

ARTHUR HARF. 

